Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acfd49e48878dd4…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 04:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb13e254c9eeb79b0d3f0adab42f8cfc SHA-1: b32945ec16ce58d9222a3ba5af4fc241f9a3b92f SHA-256: 4acfd49e48878dd4beaa5b9c3efbc77d3a7eeda296ccb1c93af8fab610fc3ce7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.verneteco.com/ckfinder/userfiles/files/nadixodasusazaxoguj.pdf In PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/58b92ab74a2edbee369dfd2745116a08/pebikujebivilojokites.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0af87b32---64583316006.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609410fd69df6---zeriweweninenarotegagati.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/27775248975.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece7b1df6c---60528356786.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/61322029068.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd1c96391---mafuxof.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/52157942396.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/pofusuwaresukesi.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/99154463505.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/zofugameparegizug.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/42893292357.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/45624970364.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/giwekaxewaxadekaribuxabez.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/kefezotit.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/50896958115.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbac53fbcc---48042731657.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/warodaw.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/sobekepegugenab.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/favudapino.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/94700257490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=peluang+sma+kelas+12+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 10796 bytes
SHA-256: fe8a854d04967ac958fb391fda2cf85c1c3ef02690ed1a7e6bfa0899a8721a1d
font_01_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 18768 bytes
SHA-256: acca5338df070e848b65936a5c00bdadbd4a5cad4835532a44549c450431594c
font_02_sfnt_off000122ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.